Shavuot is a two-day Jewish holiday that falls on the Hebrew calendar dates of Sivan 6–7. Here are the coinciding secular dates for the upcoming years:

Shavuot 2020 begins at sundown on Thursday, May 28, and concludes at nightfall on Saturday, May 30. The 10 Commandments are read on May 29. Yizkor is on May 30.

Shavuot in the Coming Years

2020:   May 28-30 / 10 Commandments: May 29 / Yizkor: May 30

2021:   May 16-18 / 10 Commandments: May 17 / Yizkor: May 18

2022:   June 4-6 / 10 Commandments: June 5 / Yizkor: June 6

2023:   May 25-27 / 10 Commandments: May 26 / Yizkor: May 27

2024:   June 11-13 / 10 Commandments: June 12 / Yizkor: June 13

2025:   June 1-3 / 10 Commandments: June 2 / Yizkor: June 3

Note: The Jewish calendar date begins at sundown of the night beforehand. Thus all holiday observances begin at sundown on the secular dates listed, with the following day being the first full day of the holiday. Jewish calendar dates conclude at nightfall.

Also note: In Israel, the holiday is observed for just one day, and Yizkor is recited shortly after the 10 Commandments are read.

Shavuot Info

Prepping for Shavuot? Here are some handy links for you:
What Is Shavuot?
Detailed Shavuot Calendar
Why Eat Dairy on Shavuot?

See Also

When is Rosh Hashanah in 2019, 2020, 2021, 2022, 2023, 2024 and 2025?
When is Yom Kippur in 2019, 2020, 2021, 2022, 2023, 2024 and 2025?
When is Sukkot in 2019, 2020, 2021, 2022, 2023, 2024 and 2025?
When is Shemini Atzeret / Simchat Torah in 2019, 2020, 2021, 2022, 2023, 2024 and 2025?
When is Chanukah in 2019, 2020, 2021, 2022, 2023, 2024 and 2025?
When is Purim in 2020, 2021, 2022, 2023, 2024 and 2025?
When is Passover in 2020, 2021, 2022, 2023, 2024 and 2025?
When is the Ninth of Av in 2020, 2021, 2022, 2023, 2024 and 2025?